The ASICS GT-4000 4 is a stability road running shoe and the Nike Zoom Fly 6 is a road running shoe. The GT-4000 4 costs about $40 less (from $140). The Zoom Fly 6 is 0.4 oz lighter (9.3 oz vs 9.7 oz).
Specs side by side
| Spec | GT-4000 4 | Zoom Fly 6 |
|---|---|---|
| Price | $140 | $180–$190 |
| Rating | 4.6 / 5 (47 reviews) | 4.7 / 5 (314 reviews) |
| Weight | 9.7 oz | 9.3 oz |
| Heel-to-toe drop | 8 mm | 8 mm |
| Support | Stability | — |
| Surface | Road | Road |
| Available for | Women | Men & Women |
Specs and prices from ASICS and Nike, checked 2026-10-11. Weight is usually for a men's size 9–10.
Which should you get?
Get the GT-4000 4 if…
- you want to spend less
Get the Zoom Fly 6 if…
- you want the lighter shoe
- you want the more widely reviewed shoe